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Effect of the blade arc angle on the performance of a Savonius wind turbine

2015; SAGE Publishing; Volume: 7; Issue: 5 Linguagem: Inglês

10.1177/1687814015584247

1687-8140

Zhaoyong Mao, Wenlong Tian,

Fluid Dynamics and Vibration Analysis

Savonius wind turbine is a common vertical axis wind turbine which simply comprises two or three arc-type blades and can generate power under poor wind conditions. With the aim of increasing the turbine’s power efficiency, the effect of the blade arc angle on the performance of a typical two-bladed Savonius wind turbine is investigated with a transient computational fluid dynamics method. Simulations were based on the Reynolds Averaged Navier–Stokes equations, and the renormalization group [Formula: see text] turbulent model was utilized. The numerical method was validated with existing experimental data. The results indicate that the turbine with a blade arc angle of [Formula: see text] generates the maximum power coefficient, 0.2836, which is 8.37% higher than that from a conventional Savonius turbine.